Millimeter-wave generation and bidirectional radio-over-fiber wired/wireless transmission using cascaded injection-locked FP-LDs

A novel scheme of cascaded injection locking, based on Fabry-Pérot laser diodes, is proposed to generate millimeter-wave carrier and to implement bidirectional RoF wired and wireless data transmission system. It was verified for the proposed technique to improve a suppression ratio of an optical carrier suppressed signal by 20dB. There was an achievement of 60GHz carrier generation which had RF peak power of −40dBm and phase noise of −103.5dBm/Hz at 1MHz offset. In addition, it was possible to support bidirectional 1.25-Gbps wired and wireless transmission by adopting the remodulation of a gain-saturated reflective semiconductor optical amplifier for the uplink.